public void DisplayPixelBuffer (CVPixelBuffer pixelBuffer)
{
DrawTextInCorner (pixelBuffer);
CVReturn error;
if (pixelBuffer != null) {
int frameWidth = (int)pixelBuffer.Width;
int frameHeight = (int)pixelBuffer.Height;
if (videoTextureCache == null) {
Console.WriteLine ("No video texture cache");
return;
}
CleanUpTextures ();
CVAttachmentMode attachmentMode;
var colorAttachments = pixelBuffer.GetAttachment <NSString> (CVImageBuffer.YCbCrMatrixKey, out attachmentMode);
if (colorAttachments == CVImageBuffer.YCbCrMatrix_ITU_R_601_4)
preferredConversion = colorConversion601;
else
preferredConversion = colorConversion709;
GL.ActiveTexture (TextureUnit.Texture0);
lumaTexture = videoTextureCache.TextureFromImage (pixelBuffer, true, All.RedExt, frameWidth, frameHeight,
All.RedExt, DataType.UnsignedByte, 0, out error);
if (lumaTexture == null)
Console.WriteLine ("Error at CVOpenGLESTextureCach.TextureFromImage");
GL.BindTexture (lumaTexture.Target, lumaTexture.Name);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)All.ClampToEdge);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)All.ClampToEdge);
GL.ActiveTexture (TextureUnit.Texture1);
chromaTexture = videoTextureCache.TextureFromImage (pixelBuffer, true, All.RgExt, frameWidth / 2, frameHeight / 2,
All.RgExt, DataType.UnsignedByte, 1, out error);
if (chromaTexture == null)
Console.WriteLine ("Error at CVOpenGLESTextureCach.TextureFromImage");
GL.BindTexture (chromaTexture.Target, chromaTexture.Name);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)All.ClampToEdge);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)All.ClampToEdge);
GL.BindFramebuffer (FramebufferTarget.Framebuffer, frameBufferHandle);
GL.Viewport (0, 0, backingWidth, backingHeight);
}
GL.ClearColor (0f, 0f, 0f, 1f);
GL.Clear (ClearBufferMask.ColorBufferBit);
GL.UseProgram (Program);
GL.Uniform1 (uniforms [(int)UniformIndex.RotationAngle], 0f);
GL.UniformMatrix3 (uniforms [(int)UniformIndex.ColorConversionMatrix], 1, false, preferredConversion);
CGRect vertexSamplingRect = AVUtilities.WithAspectRatio (Bounds, PresentationRect);
var normalizedSamplingSize = new CGSize (0f, 0f);
var cropScaleAmount = new CGSize (vertexSamplingRect.Width / Bounds.Width, vertexSamplingRect.Height / Bounds.Height);
if (cropScaleAmount.Width > cropScaleAmount.Height) {
normalizedSamplingSize.Width = 1f;
normalizedSamplingSize.Height = cropScaleAmount.Height / cropScaleAmount.Width;
} else {
normalizedSamplingSize.Width = 1f;
normalizedSamplingSize.Height = cropScaleAmount.Width / cropScaleAmount.Height;
}
float[] quadVertexData = {
-1f * (float)normalizedSamplingSize.Width, -1f * (float)normalizedSamplingSize.Height,
(float)normalizedSamplingSize.Width, -1f * (float)normalizedSamplingSize.Height,
-1f * (float)normalizedSamplingSize.Width, (float)normalizedSamplingSize.Height,
(float)normalizedSamplingSize.Width, (float)normalizedSamplingSize.Height,
};
GL.VertexAttribPointer ((int)AttributeIndex.Vertex, 2, VertexAttribPointerType.Float, false, 0, quadVertexData);
GL.EnableVertexAttribArray ((int)AttributeIndex.Vertex);
var textureSamplingRect = new CGRect (0, 0, 1, 1);
float[] quadTextureData = {
(float)textureSamplingRect.GetMinX (), (float)textureSamplingRect.GetMaxY (),
(float)textureSamplingRect.GetMaxX (), (float)textureSamplingRect.GetMaxY (),
(float)textureSamplingRect.GetMinX (), (float)textureSamplingRect.GetMinY (),
(float)textureSamplingRect.GetMaxX (), (float)textureSamplingRect.GetMinY ()
};
GL.VertexAttribPointer ((int)AttributeIndex.TextureCoordinates, 2, VertexAttribPointerType.Float, false, 0, quadTextureData);
GL.EnableVertexAttribArray ((int)AttributeIndex.TextureCoordinates);
GL.DrawArrays (BeginMode.TriangleStrip, 0, 4);
GL.BindRenderbuffer (RenderbufferTarget.Renderbuffer, colorBufferHandle);
context.PresentRenderBuffer ((int)RenderbufferTarget.Renderbuffer);
}
public void DisplayPixelBuffer(CVPixelBuffer pixelBuffer)
{
DrawTextInCorner(pixelBuffer);
CVReturn error;
if (pixelBuffer != null)
{
int frameWidth = (int)pixelBuffer.Width;
int frameHeight = (int)pixelBuffer.Height;
if (videoTextureCache == null)
{
Console.WriteLine("No video texture cache");
return;
}
CleanUpTextures();
CVAttachmentMode attachmentMode;
var colorAttachments = pixelBuffer.GetAttachment <NSString> (CVImageBuffer.YCbCrMatrixKey, out attachmentMode);
if (colorAttachments == CVImageBuffer.YCbCrMatrix_ITU_R_601_4)
{
preferredConversion = colorConversion601;
}
else
{
preferredConversion = colorConversion709;
}
GL.ActiveTexture(TextureUnit.Texture0);
lumaTexture = videoTextureCache.TextureFromImage(pixelBuffer, true, All.RedExt, frameWidth, frameHeight,
All.RedExt, DataType.UnsignedByte, 0, out error);
if (lumaTexture == null)
{
Console.WriteLine("Error at CVOpenGLESTextureCach.TextureFromImage");
}
GL.BindTexture(lumaTexture.Target, lumaTexture.Name);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)All.ClampToEdge);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)All.ClampToEdge);
GL.ActiveTexture(TextureUnit.Texture1);
chromaTexture = videoTextureCache.TextureFromImage(pixelBuffer, true, All.RgExt, frameWidth / 2, frameHeight / 2,
All.RgExt, DataType.UnsignedByte, 1, out error);
if (chromaTexture == null)
{
Console.WriteLine("Error at CVOpenGLESTextureCach.TextureFromImage");
}
GL.BindTexture(chromaTexture.Target, chromaTexture.Name);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)All.ClampToEdge);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)All.ClampToEdge);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, frameBufferHandle);
GL.Viewport(0, 0, backingWidth, backingHeight);
}
GL.ClearColor(0f, 0f, 0f, 1f);
GL.Clear(ClearBufferMask.ColorBufferBit);
GL.UseProgram(Program);
GL.Uniform1(uniforms [(int)UniformIndex.RotationAngle], 0f);
GL.UniformMatrix3(uniforms [(int)UniformIndex.ColorConversionMatrix], 1, false, preferredConversion);
CGRect vertexSamplingRect = AVUtilities.WithAspectRatio(Bounds, PresentationRect);
var normalizedSamplingSize = new CGSize(0f, 0f);
var cropScaleAmount = new CGSize(vertexSamplingRect.Width / Bounds.Width, vertexSamplingRect.Height / Bounds.Height);
if (cropScaleAmount.Width > cropScaleAmount.Height)
{
normalizedSamplingSize.Width = 1f;
normalizedSamplingSize.Height = cropScaleAmount.Height / cropScaleAmount.Width;
}
else
{
normalizedSamplingSize.Width = 1f;
normalizedSamplingSize.Height = cropScaleAmount.Width / cropScaleAmount.Height;
}
float[] quadVertexData =
{
-1f * (float)normalizedSamplingSize.Width, -1f * (float)normalizedSamplingSize.Height,
(float)normalizedSamplingSize.Width, -1f * (float)normalizedSamplingSize.Height,
-1f * (float)normalizedSamplingSize.Width, (float)normalizedSamplingSize.Height,
(float)normalizedSamplingSize.Width, (float)normalizedSamplingSize.Height,
};
GL.VertexAttribPointer((int)AttributeIndex.Vertex, 2, VertexAttribPointerType.Float, false, 0, quadVertexData);
GL.EnableVertexAttribArray((int)AttributeIndex.Vertex);
var textureSamplingRect = new CGRect(0, 0, 1, 1);
float[] quadTextureData =
{
(float)textureSamplingRect.GetMinX(), (float)textureSamplingRect.GetMaxY(),
(float)textureSamplingRect.GetMaxX(), (float)textureSamplingRect.GetMaxY(),
(float)textureSamplingRect.GetMinX(), (float)textureSamplingRect.GetMinY(),
(float)textureSamplingRect.GetMaxX(), (float)textureSamplingRect.GetMinY()
};
GL.VertexAttribPointer((int)AttributeIndex.TextureCoordinates, 2, VertexAttribPointerType.Float, false, 0, quadTextureData);
GL.EnableVertexAttribArray((int)AttributeIndex.TextureCoordinates);
GL.DrawArrays(BeginMode.TriangleStrip, 0, 4);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, colorBufferHandle);
context.PresentRenderBuffer((int)RenderbufferTarget.Renderbuffer);
}
